The Internet Pinball Serial Number Database or IPSND collects serial numbers of
pinball machines and publishes a database of these on the Internet. Our goal is
to make available a registration of all pinball machines in existence and allow
tools for slicing, dicing and visualization of the data.

The goal of submitting photos along with a serial number is to prove the accuracy
of the submission. As a member, you have the ability to vote once for every submitted
photo to give or take away SerialBot points.

If you feel the submitted photo shows the serial number clearly enough to verify
accuracy and you would like to give this submission 1 extra point.

If you feel the submitted photo does not clearly show the serial number to verify
the submission is correct and you would like to remove 1 point from this submission.

Nudging allows IPSND members to adjust the SerialBot score for a submission with a
photo attached by determining of the photo clearly shows the existence of the serial
number submitted. However, nudging is only 'Open' until there is a clear determiniation
of accuracy by members. If a serial number has more than 5 nudges and the total of
those nudges is greater than 4 or less than -3, then the nudge will be closed
automatically after the last nudge. If a submission is controversial and there are
nudges in both the positive and negative direction, then the nudge will remain open
until the balance of voting swings the point value beyond 3 (positive or negative).